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  2. Cooley–Tukey FFT algorithm - Wikipedia

    en.wikipedia.org/wiki/Cooley–Tukey_FFT_algorithm

    The Cooley–Tukey algorithm, named after J. W. Cooley and John Tukey, is the most common fast Fourier transform (FFT) algorithm. It re-expresses the discrete Fourier transform (DFT) of an arbitrary composite size = in terms of N 1 smaller DFTs of sizes N 2, recursively, to reduce the computation time to O(N log N) for highly composite N (smooth numbers).

  3. A Fistful of TOWs - Wikipedia

    en.wikipedia.org/wiki/A_Fistful_of_TOWs

    A Fistful of TOWs – TOW stands for "tube-launched, optically tracked, wire-guided missiles" [1] — is a set of rules designed for wargames with 6 mm miniatures at a scale of either 1" = 100 metres or 1 cm = 100 metres.

  4. Schönhage–Strassen algorithm - Wikipedia

    en.wikipedia.org/wiki/Schönhage–Strassen...

    This section has a simplified version of the algorithm, showing how to compute the product of two natural numbers ,, modulo a number of the form +, where = is some fixed number. The integers a , b {\displaystyle a,b} are to be divided into D = 2 k {\displaystyle D=2^{k}} blocks of M {\displaystyle M} bits, so in practical implementations, it is ...

  5. Sparse Fourier transform - Wikipedia

    en.wikipedia.org/wiki/Sparse_Fourier_transform

    The fast Fourier transform (FFT) plays an indispensable role on many scientific domains, especially on signal processing. It is one of the top-10 algorithms in the twentieth century. [2] However, with the advent of big data era, the FFT still needs to be improved in order to save more computing power.

  6. Multidimensional transform - Wikipedia

    en.wikipedia.org/wiki/Multidimensional_transform

    where "FFT" denotes the fast Fourier transform, and f is the spatial frequency spans from 0 to N/2 – 1. The proposed FFT-based imaging approach is diagnostic technology to ensure a long life and stable to culture arts. This is a simple, cheap which can be used in museums without affecting their daily use.

  7. Bailey's FFT algorithm - Wikipedia

    en.wikipedia.org/wiki/Bailey's_FFT_algorithm

    The Bailey's FFT (also known as a 4-step FFT) is a high-performance algorithm for computing the fast Fourier transform (FFT). This variation of the Cooley–Tukey FFT algorithm was originally designed for systems with hierarchical memory common in modern computers (and was the first FFT algorithm in this so called "out of core" class).

  8. Spectrum analyzer - Wikipedia

    en.wikipedia.org/wiki/Spectrum_analyzer

    An FFT analyzer computes a time-sequence of periodograms. FFT refers to a particular mathematical algorithm used in the process. This is commonly used in conjunction with a receiver and analog-to-digital converter. As above, the receiver reduces the center-frequency of a portion of the input signal spectrum, but the portion is not swept.

  9. Welch's method - Wikipedia

    en.wikipedia.org/wiki/Welch's_method

    Welch's method, named after Peter D. Welch, is an approach for spectral density estimation.It is used in physics, engineering, and applied mathematics for estimating the power of a signal at different frequencies.

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